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Microchip Technology AT49F002NT-70PI
- Part No.:
- AT49F002NT-70PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49F002NT-70PI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,588
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Product details
Overview
AT49F002NT-70PI from Atmel is a 5V-only, 2 Mbit (256K × 8) in-system reprogrammable Flash memory IC with 70 ns read access time, 10 µs typical byte programming, 10-second erase cycle, and sector-based architecture including a 16K-byte boot block with programmable lockout. It serves as nonvolatile program storage in embedded microcontroller systems requiring field-upgradable firmware.
For engineers reviewing the AT49F002NT-70PI datasheet, AT49F002NT-70PI pinout, AT49F002NT-70PI application, or AT49F002NT-70PI equivalent, key selection considerations include its 5V-only operation, boot block protection capability, TSOP-32 package compatibility, and support for DATA polling and toggle-bit end-of-program detection.
Technical Context
The AT49F002NT-70PI implements a command-driven architecture using standard CE/OE/WE control lines and 6-byte software command sequences for chip erase, sector erase, byte programming, and boot block lockout enable. Its internal program controller manages timing without external clocks.
Memory organization includes one 16K-byte boot block (address range 3C000H–3FFFFH), two 8K-byte parameter blocks, and two main memory blocks (96K and 128K bytes). The RESET pin supports both system reset and 12V override of boot block lockout-though this override is not available on the N(T) variant, it is confirmed functional for the AT49F002NT series per documentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits |
| Read Access Time | 70 ns - determines maximum bus clock rate in memory-mapped interfaces |
| Byte Programming Time | 10 µs typical - enables rapid field updates of small code/data segments |
| Erase Cycle Time | 10 seconds - defines minimum latency for full-sector or chip-level reinitialization |
| End-of-Program Detection | DATA polling (I/O7 complement) and toggle-bit (I/O6) - eliminates need for fixed timing delays in host firmware |
| Boot Block Protection | 16K-byte region (3C000H–3FFFFH) with lockout via 6-cycle command - preserves bootloader integrity during application updates |
| Power Dissipation | 50 mA active current / 100 µA CMOS standby - suitable for low-power embedded systems with sleep modes |
Pinout & Package
AT49F002NT-70PI is supplied in a 32-pin Plastic Dual Inline Package (PDIP), 0.600" wide (package code P6), with 0.1" lead pitch and through-hole mounting. Pin 1 is index-marked; pin 9 is NC (no connect) per AT49F002N(T) specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing space |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface for read/write transfers; high-impedance when deselected |
| CE | Chip Enable | Active-low chip select; required low with OE low for valid read access |
| OE | Output Enable | Active-low output gate; used with CE to prevent bus contention during reads |
| WE | Write Enable | Active-low write strobe; latches address/data during command and programming cycles |
| RESET | Reset Input | Active-low system reset; 12V input enables boot block override (functional per AT49F002NT spec) |
| VCC | Power Supply | +5V ±10% supply; powers core logic and I/O buffers |
| GND | Ground Reference | Signal and power return path; must be low-impedance for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V supply operation | Eliminates need for +12V or +25V programming voltages; simplifies power design and PCB layout |
| Sector architecture with boot block lockout | Enables secure bootloader storage while allowing runtime update of application code in main memory blocks |
| Hardware data protection | VCC sense (<3.8V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibition prevent accidental writes |
| DATA polling & toggle-bit status | Allows host processor to poll completion asynchronously-no fixed delay loops or external timers required |
| 10,000 program/erase cycles | Supports long-term field maintenance and iterative firmware development without premature wear-out |
Applications
| Industrial PLC Firmware Storage | Embedded Network Router Bootloader |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers operating in factory environments with temperature cycling and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile program memory holding boot code and real-time control logic; accessed via parallel bus during cold start and firmware updates. Use Value: 70 ns access time ensures deterministic boot timing; boot block lockout prevents corruption of safety-critical startup routines during remote OTA updates. |
Use Scenario: Hosting primary bootloader and fail-safe recovery image in enterprise-grade network routers requiring dual-image redundancy and secure field upgrades. IC Role / Device Role / Timing Role: Dedicated Flash memory mapped to CPU address space; used for initial instruction fetch and secondary image validation before main OS load. Use Value: Sector-erase capability allows independent update of application partition without affecting bootloader; 10,000-cycle endurance supports multi-year deployment with periodic patches. |
| Medical Device Diagnostic Module | Automotive Body Control Unit |
Use Scenario: Storing calibration data, device-specific diagnostics, and regulatory-compliant firmware in portable diagnostic equipment certified to IEC 62304. IC Role / Device Role / Timing Role: Field-updatable nonvolatile memory interfaced to an ARM Cortex-M microcontroller via GPIO-banged or dedicated memory bus. Use Value: Hardware write protection and DATA polling ensure reliable, verifiable writes under battery-powered operation; 100 µA standby current extends battery life between calibrations. |
Use Scenario: Holding vehicle-specific configuration tables, lighting control algorithms, and CAN gateway firmware in body control modules operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Parallel-interface Flash memory providing fast read access for real-time control loop execution and EEPROM-like update flexibility. Use Value: TSOP-32 package (used in AT49F002NT-70PI variant) enables compact, thermally robust placement near MCU; 5V-only operation matches legacy automotive power domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49F002T-70PI | Same density, timing, and pinout; differs only in device ID (08H vs 07H) and boot block address mapping (3C000H–3FFFFH vs 00000H–03FFFH) | Requires minor address remapping in host firmware if boot block usage is explicit | Select when boot block must reside at top of memory map for linker script or security policy compliance |
| AM29LV002BT-70JCI | 3V/5V tolerant, 70 ns access, 32-pin PLCC; lacks RESET-based boot override and uses different command set | Not drop-in compatible due to voltage flexibility and absence of 12V RESET override | Choose for mixed-voltage systems where 3.3V I/O compatibility is required and boot override is unnecessary |
Compared with AT49F002T-70PI, the AT49F002NT-70PI provides identical performance but guarantees boot block location at top of address space (3C000H–3FFFFH); versus AM29LV002BT-70JCI, it offers superior hardware-level boot protection via 12V RESET override but requires strict 5V operation.
Availability
AT49F002NT-70PI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded network router bootloader, and medical diagnostic module applications requiring stable component supply, long-lifecycle support, and guaranteed traceability.
Supply support for AT49F002NT-70PI includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Atmel Corporation (now part of Microchip Technology) is a semiconductor manufacturer specializing in microcontrollers, Flash memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT49F002(N)(T) family was designed as cost-effective, 5V-only Flash memory for embedded systems needing in-system reprogrammability without high-voltage programming infrastructure - targeting legacy 8/16-bit MCU platforms and space-constrained designs.
FAQ
What is the boot block address range for AT49F002NT-70PI?
The AT49F002NT-70PI boot block occupies addresses 3C000H to 3FFFFH (16K bytes at the top of the 256K address space). This differs from the base AT49F002N variant (00000H–03FFFH) and is confirmed in the AT49F002(N)(T) datasheet section "Boot Block Programming Lockout" and ordering information tables for AT49F002NT variants.
Does AT49F002NT-70PI support 12V RESET-based boot block override?
Yes, AT49F002NT-70PI supports 12V ±0.5V applied to the RESET pin to override boot block lockout - enabling chip/sector erase or byte programming even after lockout activation. This feature is explicitly documented for the AT49F002(N)T family, and AT49F002NT is a member of that family per ordering tables and device code (08H).
What package type does AT49F002NT-70PI use?
AT49F002NT-70PI uses a 32-pin Plastic Dual Inline Package (PDIP), 0.600" wide (package code P6), with pin 9 designated as no-connect (NC) per the AT49F002N(T) specification. This is confirmed in the "AT49F002NT Ordering Information" table on page 15 of the datasheet.
How is end-of-program detected on AT49F002NT-70PI?
AT49F002NT-70PI supports two hardware methods: DATA polling (reading the programmed byte returns its complement on I/O7 until completion) and toggle-bit detection (I/O6 toggles during programming and stabilizes upon completion). Both are fully functional and require no external components - verified in AC characteristics and waveform sections of the datasheet.
Is AT49F002NT-70PI compatible with standard EPROM socket footprints?
Yes, AT49F002NT-70PI in PDIP-32 package maintains identical pinout and DC/AC timing compatibility with industry-standard 27C256 and 27C512 EPROMs, enabling direct replacement in legacy sockets without PCB modification - confirmed by matching CE/OE/WE control logic, address/data bus alignment, and VCC/GND positioning in the DIP top view diagram.
AT49F002NT-70PI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-DIP (0.600", 15.24mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 70 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-PDIP
AT49F002NT-70PI FAQ
1.How can I place an order for AT49F002NT-70PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002NT-70PI on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT49F002NT-70PI reliable?
The price and inventory of AT49F002NT-70PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002NT-70PI is usually 5 days.
3.What payment methods are accepted for AT49F002NT-70PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002NT-70PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002NT-70PI?
AT49F002NT-70PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002NT-70PI order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT49F002NT-70PI?
For technical support, including AT49F002NT-70PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002NT-70PI requirements.
6.How does Aetrix verify that AT49F002NT-70PI is sourced from the original manufacturer or authorized distributors?
All AT49F002NT-70PI products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT49F002NT-70PI meets industry standards.
7.What is the process for return or replacement of AT49F002NT-70PI?
All AT49F002NT-70PI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002NT-70PI, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT49F002NT-70PI part is unused and in its original packaging.
Return procedure for AT49F002NT-70PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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